US 2025/0105596 A1 · COHERENT RING VERTICAL CAVITY SURFACE EMITTING LASER

Abstract

Disclosed examples include Coherent Ring Vertical Cavity Surface Emitting Lasers (CR-VCSEL). Examples includes Vertical Cavity Surface Emitting Lasers with a containing a Coherent Ring Vertical Cavity Surface Emitting Laser stack (CR-VCSEL stack) consisting of a first mirror layer, an active layer, an emission aperture, and a second mirror layer, under a top metal layer within a closed ring. The CR-VCSEL has a closed ring structure. The emission aperture width of the closed ring is such that the closed ring supports a single transverse optical mode, it but supports multiple circumferential optical modes around the ring within the closed ring geometry. The closed ring may have a length of from microns to millimeters. The transverse width of the closed ring and length of the closed ring may be tailored to control the CR-VCSEL power output, degree of coherence, and laser beam emission pattern.

Claims20

Dependent claims

A Coherent Ring Vertical Cavity Surface Emitting Laser (CR-VCSEL) comprising:

a substrate;
a bottom metal layer in electrical contact with a bottom surface of an active layer;
a CR-VCSEL stack on the substrate, the CR-VCSEL stack being a closed ring, the CR-VCSEL stack comprising;
a first mirror layer;
an active layer on the first mirror layer;
an emission aperture with a single optical mode transverse to the closed ring;
a second mirror layer above the active layer;
and
a top metal layer on the second mirror layer, the top metal layer being in electrical contact with the top surface of the active layer, wherein the emission aperture is between the bottom metal layer and the top metal layer;
a first terminal in electrical contact with the bottom metal layer;
and
a second terminal in electrical contact with the top metal layer.

9 more elements

Dependencies are inferred from the claim text.

Coherent ring vertical cavity surface emitting laser

Life of this patent

Coherent ring vertical cavity surface emitting laser

Life of this patent

Abstract

Claims20